2 * Copyright © 2006 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/dmi.h>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
34 #define SLAVE_ADDR1 0x70
35 #define SLAVE_ADDR2 0x72
37 static int panel_type
;
40 find_section(struct bdb_header
*bdb
, int section_id
)
44 u16 total
, current_size
;
47 /* skip to first section */
48 index
+= bdb
->header_size
;
49 total
= bdb
->bdb_size
;
51 /* walk the sections looking for section_id */
52 while (index
+ 3 < total
) {
53 current_id
= *(base
+ index
);
56 current_size
= *((u16
*)(base
+ index
));
59 if (index
+ current_size
> total
)
62 if (current_id
== section_id
)
65 index
+= current_size
;
72 get_blocksize(void *p
)
74 u16
*block_ptr
, block_size
;
76 block_ptr
= (u16
*)((char *)p
- 2);
77 block_size
= *block_ptr
;
82 fill_detail_timing_data(struct drm_display_mode
*panel_fixed_mode
,
83 const struct lvds_dvo_timing
*dvo_timing
)
85 panel_fixed_mode
->hdisplay
= (dvo_timing
->hactive_hi
<< 8) |
86 dvo_timing
->hactive_lo
;
87 panel_fixed_mode
->hsync_start
= panel_fixed_mode
->hdisplay
+
88 ((dvo_timing
->hsync_off_hi
<< 8) | dvo_timing
->hsync_off_lo
);
89 panel_fixed_mode
->hsync_end
= panel_fixed_mode
->hsync_start
+
90 dvo_timing
->hsync_pulse_width
;
91 panel_fixed_mode
->htotal
= panel_fixed_mode
->hdisplay
+
92 ((dvo_timing
->hblank_hi
<< 8) | dvo_timing
->hblank_lo
);
94 panel_fixed_mode
->vdisplay
= (dvo_timing
->vactive_hi
<< 8) |
95 dvo_timing
->vactive_lo
;
96 panel_fixed_mode
->vsync_start
= panel_fixed_mode
->vdisplay
+
97 dvo_timing
->vsync_off
;
98 panel_fixed_mode
->vsync_end
= panel_fixed_mode
->vsync_start
+
99 dvo_timing
->vsync_pulse_width
;
100 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vdisplay
+
101 ((dvo_timing
->vblank_hi
<< 8) | dvo_timing
->vblank_lo
);
102 panel_fixed_mode
->clock
= dvo_timing
->clock
* 10;
103 panel_fixed_mode
->type
= DRM_MODE_TYPE_PREFERRED
;
105 if (dvo_timing
->hsync_positive
)
106 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
108 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
110 if (dvo_timing
->vsync_positive
)
111 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
113 panel_fixed_mode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
115 /* Some VBTs have bogus h/vtotal values */
116 if (panel_fixed_mode
->hsync_end
> panel_fixed_mode
->htotal
)
117 panel_fixed_mode
->htotal
= panel_fixed_mode
->hsync_end
+ 1;
118 if (panel_fixed_mode
->vsync_end
> panel_fixed_mode
->vtotal
)
119 panel_fixed_mode
->vtotal
= panel_fixed_mode
->vsync_end
+ 1;
121 drm_mode_set_name(panel_fixed_mode
);
125 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing
*a
,
126 const struct lvds_dvo_timing
*b
)
128 if (a
->hactive_hi
!= b
->hactive_hi
||
129 a
->hactive_lo
!= b
->hactive_lo
)
132 if (a
->hsync_off_hi
!= b
->hsync_off_hi
||
133 a
->hsync_off_lo
!= b
->hsync_off_lo
)
136 if (a
->hsync_pulse_width
!= b
->hsync_pulse_width
)
139 if (a
->hblank_hi
!= b
->hblank_hi
||
140 a
->hblank_lo
!= b
->hblank_lo
)
143 if (a
->vactive_hi
!= b
->vactive_hi
||
144 a
->vactive_lo
!= b
->vactive_lo
)
147 if (a
->vsync_off
!= b
->vsync_off
)
150 if (a
->vsync_pulse_width
!= b
->vsync_pulse_width
)
153 if (a
->vblank_hi
!= b
->vblank_hi
||
154 a
->vblank_lo
!= b
->vblank_lo
)
160 static const struct lvds_dvo_timing
*
161 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data
*lvds_lfp_data
,
162 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
,
166 * the size of fp_timing varies on the different platform.
167 * So calculate the DVO timing relative offset in LVDS data
168 * entry to get the DVO timing entry
172 lvds_lfp_data_ptrs
->ptr
[1].dvo_timing_offset
-
173 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
;
174 int dvo_timing_offset
=
175 lvds_lfp_data_ptrs
->ptr
[0].dvo_timing_offset
-
176 lvds_lfp_data_ptrs
->ptr
[0].fp_timing_offset
;
177 char *entry
= (char *)lvds_lfp_data
->data
+ lfp_data_size
* index
;
179 return (struct lvds_dvo_timing
*)(entry
+ dvo_timing_offset
);
182 /* get lvds_fp_timing entry
183 * this function may return NULL if the corresponding entry is invalid
185 static const struct lvds_fp_timing
*
186 get_lvds_fp_timing(const struct bdb_header
*bdb
,
187 const struct bdb_lvds_lfp_data
*data
,
188 const struct bdb_lvds_lfp_data_ptrs
*ptrs
,
191 size_t data_ofs
= (const u8
*)data
- (const u8
*)bdb
;
192 u16 data_size
= ((const u16
*)data
)[-1]; /* stored in header */
195 if (index
>= ARRAY_SIZE(ptrs
->ptr
))
197 ofs
= ptrs
->ptr
[index
].fp_timing_offset
;
198 if (ofs
< data_ofs
||
199 ofs
+ sizeof(struct lvds_fp_timing
) > data_ofs
+ data_size
)
201 return (const struct lvds_fp_timing
*)((const u8
*)bdb
+ ofs
);
204 /* Try to find integrated panel data */
206 parse_lfp_panel_data(struct drm_i915_private
*dev_priv
,
207 struct bdb_header
*bdb
)
209 const struct bdb_lvds_options
*lvds_options
;
210 const struct bdb_lvds_lfp_data
*lvds_lfp_data
;
211 const struct bdb_lvds_lfp_data_ptrs
*lvds_lfp_data_ptrs
;
212 const struct lvds_dvo_timing
*panel_dvo_timing
;
213 const struct lvds_fp_timing
*fp_timing
;
214 struct drm_display_mode
*panel_fixed_mode
;
215 int i
, downclock
, drrs_mode
;
217 lvds_options
= find_section(bdb
, BDB_LVDS_OPTIONS
);
221 dev_priv
->vbt
.lvds_dither
= lvds_options
->pixel_dither
;
222 if (lvds_options
->panel_type
== 0xff)
225 panel_type
= lvds_options
->panel_type
;
227 drrs_mode
= (lvds_options
->dps_panel_type_bits
228 >> (panel_type
* 2)) & MODE_MASK
;
230 * VBT has static DRRS = 0 and seamless DRRS = 2.
231 * The below piece of code is required to adjust vbt.drrs_type
232 * to match the enum drrs_support_type.
236 dev_priv
->vbt
.drrs_type
= STATIC_DRRS_SUPPORT
;
237 DRM_DEBUG_KMS("DRRS supported mode is static\n");
240 dev_priv
->vbt
.drrs_type
= SEAMLESS_DRRS_SUPPORT
;
241 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
244 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
245 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
249 lvds_lfp_data
= find_section(bdb
, BDB_LVDS_LFP_DATA
);
253 lvds_lfp_data_ptrs
= find_section(bdb
, BDB_LVDS_LFP_DATA_PTRS
);
254 if (!lvds_lfp_data_ptrs
)
257 dev_priv
->vbt
.lvds_vbt
= 1;
259 panel_dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
261 lvds_options
->panel_type
);
263 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
264 if (!panel_fixed_mode
)
267 fill_detail_timing_data(panel_fixed_mode
, panel_dvo_timing
);
269 dev_priv
->vbt
.lfp_lvds_vbt_mode
= panel_fixed_mode
;
271 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
272 drm_mode_debug_printmodeline(panel_fixed_mode
);
275 * Iterate over the LVDS panel timing info to find the lowest clock
276 * for the native resolution.
278 downclock
= panel_dvo_timing
->clock
;
279 for (i
= 0; i
< 16; i
++) {
280 const struct lvds_dvo_timing
*dvo_timing
;
282 dvo_timing
= get_lvds_dvo_timing(lvds_lfp_data
,
285 if (lvds_dvo_timing_equal_size(dvo_timing
, panel_dvo_timing
) &&
286 dvo_timing
->clock
< downclock
)
287 downclock
= dvo_timing
->clock
;
290 if (downclock
< panel_dvo_timing
->clock
&& i915
.lvds_downclock
) {
291 dev_priv
->lvds_downclock_avail
= 1;
292 dev_priv
->lvds_downclock
= downclock
* 10;
293 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
294 "Normal Clock %dKHz, downclock %dKHz\n",
295 panel_fixed_mode
->clock
, 10*downclock
);
298 fp_timing
= get_lvds_fp_timing(bdb
, lvds_lfp_data
,
300 lvds_options
->panel_type
);
302 /* check the resolution, just to be sure */
303 if (fp_timing
->x_res
== panel_fixed_mode
->hdisplay
&&
304 fp_timing
->y_res
== panel_fixed_mode
->vdisplay
) {
305 dev_priv
->vbt
.bios_lvds_val
= fp_timing
->lvds_reg_val
;
306 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
307 dev_priv
->vbt
.bios_lvds_val
);
313 parse_lfp_backlight(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
315 const struct bdb_lfp_backlight_data
*backlight_data
;
316 const struct bdb_lfp_backlight_data_entry
*entry
;
318 backlight_data
= find_section(bdb
, BDB_LVDS_BACKLIGHT
);
322 if (backlight_data
->entry_size
!= sizeof(backlight_data
->data
[0])) {
323 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
324 backlight_data
->entry_size
);
328 entry
= &backlight_data
->data
[panel_type
];
330 dev_priv
->vbt
.backlight
.present
= entry
->type
== BDB_BACKLIGHT_TYPE_PWM
;
331 if (!dev_priv
->vbt
.backlight
.present
) {
332 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
337 dev_priv
->vbt
.backlight
.pwm_freq_hz
= entry
->pwm_freq_hz
;
338 dev_priv
->vbt
.backlight
.active_low_pwm
= entry
->active_low_pwm
;
339 dev_priv
->vbt
.backlight
.min_brightness
= entry
->min_brightness
;
340 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
341 "active %s, min brightness %u, level %u\n",
342 dev_priv
->vbt
.backlight
.pwm_freq_hz
,
343 dev_priv
->vbt
.backlight
.active_low_pwm
? "low" : "high",
344 dev_priv
->vbt
.backlight
.min_brightness
,
345 backlight_data
->level
[panel_type
]);
348 /* Try to find sdvo panel data */
350 parse_sdvo_panel_data(struct drm_i915_private
*dev_priv
,
351 struct bdb_header
*bdb
)
353 struct lvds_dvo_timing
*dvo_timing
;
354 struct drm_display_mode
*panel_fixed_mode
;
357 index
= i915
.vbt_sdvo_panel_type
;
359 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
364 struct bdb_sdvo_lvds_options
*sdvo_lvds_options
;
366 sdvo_lvds_options
= find_section(bdb
, BDB_SDVO_LVDS_OPTIONS
);
367 if (!sdvo_lvds_options
)
370 index
= sdvo_lvds_options
->panel_type
;
373 dvo_timing
= find_section(bdb
, BDB_SDVO_PANEL_DTDS
);
377 panel_fixed_mode
= kzalloc(sizeof(*panel_fixed_mode
), GFP_KERNEL
);
378 if (!panel_fixed_mode
)
381 fill_detail_timing_data(panel_fixed_mode
, dvo_timing
+ index
);
383 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= panel_fixed_mode
;
385 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
386 drm_mode_debug_printmodeline(panel_fixed_mode
);
389 static int intel_bios_ssc_frequency(struct drm_device
*dev
,
392 switch (INTEL_INFO(dev
)->gen
) {
394 return alternate
? 66667 : 48000;
397 return alternate
? 100000 : 96000;
399 return alternate
? 100000 : 120000;
404 parse_general_features(struct drm_i915_private
*dev_priv
,
405 struct bdb_header
*bdb
)
407 struct drm_device
*dev
= dev_priv
->dev
;
408 struct bdb_general_features
*general
;
410 general
= find_section(bdb
, BDB_GENERAL_FEATURES
);
412 dev_priv
->vbt
.int_tv_support
= general
->int_tv_support
;
413 dev_priv
->vbt
.int_crt_support
= general
->int_crt_support
;
414 dev_priv
->vbt
.lvds_use_ssc
= general
->enable_ssc
;
415 dev_priv
->vbt
.lvds_ssc_freq
=
416 intel_bios_ssc_frequency(dev
, general
->ssc_freq
);
417 dev_priv
->vbt
.display_clock_mode
= general
->display_clock_mode
;
418 dev_priv
->vbt
.fdi_rx_polarity_inverted
= general
->fdi_rx_polarity_inverted
;
419 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
420 dev_priv
->vbt
.int_tv_support
,
421 dev_priv
->vbt
.int_crt_support
,
422 dev_priv
->vbt
.lvds_use_ssc
,
423 dev_priv
->vbt
.lvds_ssc_freq
,
424 dev_priv
->vbt
.display_clock_mode
,
425 dev_priv
->vbt
.fdi_rx_polarity_inverted
);
430 parse_general_definitions(struct drm_i915_private
*dev_priv
,
431 struct bdb_header
*bdb
)
433 struct bdb_general_definitions
*general
;
435 general
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
437 u16 block_size
= get_blocksize(general
);
438 if (block_size
>= sizeof(*general
)) {
439 int bus_pin
= general
->crt_ddc_gmbus_pin
;
440 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin
);
441 if (intel_gmbus_is_port_valid(bus_pin
))
442 dev_priv
->vbt
.crt_ddc_pin
= bus_pin
;
444 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
451 parse_sdvo_device_mapping(struct drm_i915_private
*dev_priv
,
452 struct bdb_header
*bdb
)
454 struct sdvo_device_mapping
*p_mapping
;
455 struct bdb_general_definitions
*p_defs
;
456 union child_device_config
*p_child
;
457 int i
, child_device_num
, count
;
460 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
462 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
465 /* judge whether the size of child device meets the requirements.
466 * If the child device size obtained from general definition block
467 * is different with sizeof(struct child_device_config), skip the
468 * parsing of sdvo device info
470 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
471 /* different child dev size . Ignore it */
472 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
475 /* get the block size of general definitions */
476 block_size
= get_blocksize(p_defs
);
477 /* get the number of child device */
478 child_device_num
= (block_size
- sizeof(*p_defs
)) /
481 for (i
= 0; i
< child_device_num
; i
++) {
482 p_child
= &(p_defs
->devices
[i
]);
483 if (!p_child
->old
.device_type
) {
484 /* skip the device block if device type is invalid */
487 if (p_child
->old
.slave_addr
!= SLAVE_ADDR1
&&
488 p_child
->old
.slave_addr
!= SLAVE_ADDR2
) {
490 * If the slave address is neither 0x70 nor 0x72,
491 * it is not a SDVO device. Skip it.
495 if (p_child
->old
.dvo_port
!= DEVICE_PORT_DVOB
&&
496 p_child
->old
.dvo_port
!= DEVICE_PORT_DVOC
) {
497 /* skip the incorrect SDVO port */
498 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
501 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
503 p_child
->old
.slave_addr
,
504 (p_child
->old
.dvo_port
== DEVICE_PORT_DVOB
) ?
506 p_mapping
= &(dev_priv
->sdvo_mappings
[p_child
->old
.dvo_port
- 1]);
507 if (!p_mapping
->initialized
) {
508 p_mapping
->dvo_port
= p_child
->old
.dvo_port
;
509 p_mapping
->slave_addr
= p_child
->old
.slave_addr
;
510 p_mapping
->dvo_wiring
= p_child
->old
.dvo_wiring
;
511 p_mapping
->ddc_pin
= p_child
->old
.ddc_pin
;
512 p_mapping
->i2c_pin
= p_child
->old
.i2c_pin
;
513 p_mapping
->initialized
= 1;
514 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
516 p_mapping
->slave_addr
,
517 p_mapping
->dvo_wiring
,
521 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
522 "two SDVO device.\n");
524 if (p_child
->old
.slave2_addr
) {
525 /* Maybe this is a SDVO device with multiple inputs */
526 /* And the mapping info is not added */
527 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
528 " is a SDVO device with multiple inputs.\n");
534 /* No SDVO device info is found */
535 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
541 parse_driver_features(struct drm_i915_private
*dev_priv
,
542 struct bdb_header
*bdb
)
544 struct bdb_driver_features
*driver
;
546 driver
= find_section(bdb
, BDB_DRIVER_FEATURES
);
550 if (driver
->lvds_config
== BDB_DRIVER_FEATURE_EDP
)
551 dev_priv
->vbt
.edp_support
= 1;
553 if (driver
->dual_frequency
)
554 dev_priv
->render_reclock_avail
= true;
556 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver
->drrs_enabled
);
558 * If DRRS is not supported, drrs_type has to be set to 0.
559 * This is because, VBT is configured in such a way that
560 * static DRRS is 0 and DRRS not supported is represented by
561 * driver->drrs_enabled=false
563 if (!driver
->drrs_enabled
)
564 dev_priv
->vbt
.drrs_type
= DRRS_NOT_SUPPORTED
;
568 parse_edp(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
571 struct edp_power_seq
*edp_pps
;
572 struct edp_link_params
*edp_link_params
;
574 edp
= find_section(bdb
, BDB_EDP
);
576 if (dev_priv
->vbt
.edp_support
)
577 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
581 switch ((edp
->color_depth
>> (panel_type
* 2)) & 3) {
583 dev_priv
->vbt
.edp_bpp
= 18;
586 dev_priv
->vbt
.edp_bpp
= 24;
589 dev_priv
->vbt
.edp_bpp
= 30;
593 /* Get the eDP sequencing and link info */
594 edp_pps
= &edp
->power_seqs
[panel_type
];
595 edp_link_params
= &edp
->link_params
[panel_type
];
597 dev_priv
->vbt
.edp_pps
= *edp_pps
;
599 switch (edp_link_params
->rate
) {
601 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_1_62
;
604 dev_priv
->vbt
.edp_rate
= DP_LINK_BW_2_7
;
607 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
608 edp_link_params
->rate
);
612 switch (edp_link_params
->lanes
) {
614 dev_priv
->vbt
.edp_lanes
= 1;
617 dev_priv
->vbt
.edp_lanes
= 2;
620 dev_priv
->vbt
.edp_lanes
= 4;
623 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
624 edp_link_params
->lanes
);
628 switch (edp_link_params
->preemphasis
) {
629 case EDP_PREEMPHASIS_NONE
:
630 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_0
;
632 case EDP_PREEMPHASIS_3_5dB
:
633 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_3_5
;
635 case EDP_PREEMPHASIS_6dB
:
636 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_6
;
638 case EDP_PREEMPHASIS_9_5dB
:
639 dev_priv
->vbt
.edp_preemphasis
= DP_TRAIN_PRE_EMPHASIS_9_5
;
642 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
643 edp_link_params
->preemphasis
);
647 switch (edp_link_params
->vswing
) {
648 case EDP_VSWING_0_4V
:
649 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_400
;
651 case EDP_VSWING_0_6V
:
652 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_600
;
654 case EDP_VSWING_0_8V
:
655 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_800
;
657 case EDP_VSWING_1_2V
:
658 dev_priv
->vbt
.edp_vswing
= DP_TRAIN_VOLTAGE_SWING_1200
;
661 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
662 edp_link_params
->vswing
);
667 static u8
*goto_next_sequence(u8
*data
, int *size
)
675 /* goto first element */
679 case MIPI_SEQ_ELEM_SEND_PKT
:
681 * skip by this element payload size
682 * skip elem id, command flag and data type
689 len
= *((u16
*)data
);
696 data
= data
+ 2 + len
;
698 case MIPI_SEQ_ELEM_DELAY
:
699 /* skip by elem id, and delay is 4 bytes */
706 case MIPI_SEQ_ELEM_GPIO
:
714 DRM_ERROR("Unknown element\n");
718 /* end of sequence ? */
723 /* goto next sequence or end of block byte */
729 /* update amount of data left for the sequence block to be parsed */
735 parse_mipi(struct drm_i915_private
*dev_priv
, struct bdb_header
*bdb
)
737 struct bdb_mipi_config
*start
;
738 struct bdb_mipi_sequence
*sequence
;
739 struct mipi_config
*config
;
740 struct mipi_pps_data
*pps
;
742 int i
, panel_id
, seq_size
;
745 /* parse MIPI blocks only if LFP type is MIPI */
746 if (!dev_priv
->vbt
.has_mipi
)
749 /* Initialize this to undefined indicating no generic MIPI support */
750 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_UNDEFINED_PANEL_ID
;
752 /* Block #40 is already parsed and panel_fixed_mode is
753 * stored in dev_priv->lfp_lvds_vbt_mode
754 * resuse this when needed
757 /* Parse #52 for panel index used from panel_type already
760 start
= find_section(bdb
, BDB_MIPI_CONFIG
);
762 DRM_DEBUG_KMS("No MIPI config BDB found");
766 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
770 * get hold of the correct configuration block and pps data as per
771 * the panel_type as index
773 config
= &start
->config
[panel_type
];
774 pps
= &start
->pps
[panel_type
];
776 /* store as of now full data. Trim when we realise all is not needed */
777 dev_priv
->vbt
.dsi
.config
= kmemdup(config
, sizeof(struct mipi_config
), GFP_KERNEL
);
778 if (!dev_priv
->vbt
.dsi
.config
)
781 dev_priv
->vbt
.dsi
.pps
= kmemdup(pps
, sizeof(struct mipi_pps_data
), GFP_KERNEL
);
782 if (!dev_priv
->vbt
.dsi
.pps
) {
783 kfree(dev_priv
->vbt
.dsi
.config
);
787 /* We have mandatory mipi config blocks. Initialize as generic panel */
788 dev_priv
->vbt
.dsi
.panel_id
= MIPI_DSI_GENERIC_PANEL_ID
;
790 /* Check if we have sequence block as well */
791 sequence
= find_section(bdb
, BDB_MIPI_SEQUENCE
);
793 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
797 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
799 block_size
= get_blocksize(sequence
);
802 * parse the sequence block for individual sequences
804 dev_priv
->vbt
.dsi
.seq_version
= sequence
->version
;
806 seq_data
= &sequence
->data
[0];
809 * sequence block is variable length and hence we need to parse and
810 * get the sequence data for specific panel id
812 for (i
= 0; i
< MAX_MIPI_CONFIGURATIONS
; i
++) {
813 panel_id
= *seq_data
;
814 seq_size
= *((u16
*) (seq_data
+ 1));
815 if (panel_id
== panel_type
)
818 /* skip the sequence including seq header of 3 bytes */
819 seq_data
= seq_data
+ 3 + seq_size
;
820 if ((seq_data
- &sequence
->data
[0]) > block_size
) {
821 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
826 if (i
== MAX_MIPI_CONFIGURATIONS
) {
827 DRM_ERROR("Sequence block detected but no valid configuration\n");
831 /* check if found sequence is completely within the sequence block
832 * just being paranoid */
833 if (seq_size
> block_size
) {
834 DRM_ERROR("Corrupted sequence/size, bailing out\n");
838 /* skip the panel id(1 byte) and seq size(2 bytes) */
839 dev_priv
->vbt
.dsi
.data
= kmemdup(seq_data
+ 3, seq_size
, GFP_KERNEL
);
840 if (!dev_priv
->vbt
.dsi
.data
)
844 * loop into the sequence data and split into multiple sequneces
845 * There are only 5 types of sequences as of now
847 data
= dev_priv
->vbt
.dsi
.data
;
848 dev_priv
->vbt
.dsi
.size
= seq_size
;
850 /* two consecutive 0x00 indicate end of all sequences */
853 if (MIPI_SEQ_MAX
> seq_id
&& seq_id
> MIPI_SEQ_UNDEFINED
) {
854 dev_priv
->vbt
.dsi
.sequence
[seq_id
] = data
;
855 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id
);
857 DRM_ERROR("undefined sequence\n");
861 /* partial parsing to skip elements */
862 data
= goto_next_sequence(data
, &seq_size
);
865 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
870 break; /* end of sequence reached */
873 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
876 kfree(dev_priv
->vbt
.dsi
.data
);
877 dev_priv
->vbt
.dsi
.data
= NULL
;
879 /* error during parsing so set all pointers to null
880 * because of partial parsing */
881 memset(dev_priv
->vbt
.dsi
.sequence
, 0, sizeof(dev_priv
->vbt
.dsi
.sequence
));
884 static void parse_ddi_port(struct drm_i915_private
*dev_priv
, enum port port
,
885 struct bdb_header
*bdb
)
887 union child_device_config
*it
, *child
= NULL
;
888 struct ddi_vbt_port_info
*info
= &dev_priv
->vbt
.ddi_port_info
[port
];
889 uint8_t hdmi_level_shift
;
891 bool is_dvi
, is_hdmi
, is_dp
, is_edp
, is_crt
;
893 /* Each DDI port can have more than one value on the "DVO Port" field,
894 * so look for all the possible values for each port and abort if more
895 * than one is found. */
896 int dvo_ports
[][2] = {
897 {DVO_PORT_HDMIA
, DVO_PORT_DPA
},
898 {DVO_PORT_HDMIB
, DVO_PORT_DPB
},
899 {DVO_PORT_HDMIC
, DVO_PORT_DPC
},
900 {DVO_PORT_HDMID
, DVO_PORT_DPD
},
901 {DVO_PORT_CRT
, -1 /* Port E can only be DVO_PORT_CRT */ },
904 /* Find the child device to use, abort if more than one found. */
905 for (i
= 0; i
< dev_priv
->vbt
.child_dev_num
; i
++) {
906 it
= dev_priv
->vbt
.child_dev
+ i
;
908 for (j
= 0; j
< 2; j
++) {
909 if (dvo_ports
[port
][j
] == -1)
912 if (it
->common
.dvo_port
== dvo_ports
[port
][j
]) {
914 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
925 aux_channel
= child
->raw
[25];
927 is_dvi
= child
->common
.device_type
& DEVICE_TYPE_TMDS_DVI_SIGNALING
;
928 is_dp
= child
->common
.device_type
& DEVICE_TYPE_DISPLAYPORT_OUTPUT
;
929 is_crt
= child
->common
.device_type
& DEVICE_TYPE_ANALOG_OUTPUT
;
930 is_hdmi
= is_dvi
&& (child
->common
.device_type
& DEVICE_TYPE_NOT_HDMI_OUTPUT
) == 0;
931 is_edp
= is_dp
&& (child
->common
.device_type
& DEVICE_TYPE_INTERNAL_CONNECTOR
);
933 info
->supports_dvi
= is_dvi
;
934 info
->supports_hdmi
= is_hdmi
;
935 info
->supports_dp
= is_dp
;
937 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
938 port_name(port
), is_dp
, is_hdmi
, is_dvi
, is_edp
, is_crt
);
940 if (is_edp
&& is_dvi
)
941 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
943 if (is_crt
&& port
!= PORT_E
)
944 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port
));
945 if (is_crt
&& (is_dvi
|| is_dp
))
946 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
948 if (is_dvi
&& (port
== PORT_A
|| port
== PORT_E
))
949 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port
));
950 if (!is_dvi
&& !is_dp
&& !is_crt
)
951 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
953 if (is_edp
&& (port
== PORT_B
|| port
== PORT_C
|| port
== PORT_E
))
954 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port
));
957 if (child
->common
.ddc_pin
== 0x05 && port
!= PORT_B
)
958 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
959 if (child
->common
.ddc_pin
== 0x04 && port
!= PORT_C
)
960 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
961 if (child
->common
.ddc_pin
== 0x06 && port
!= PORT_D
)
962 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
966 if (aux_channel
== 0x40 && port
!= PORT_A
)
967 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
968 if (aux_channel
== 0x10 && port
!= PORT_B
)
969 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
970 if (aux_channel
== 0x20 && port
!= PORT_C
)
971 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
972 if (aux_channel
== 0x30 && port
!= PORT_D
)
973 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
976 if (bdb
->version
>= 158) {
977 /* The VBT HDMI level shift values match the table we have. */
978 hdmi_level_shift
= child
->raw
[7] & 0xF;
979 if (hdmi_level_shift
< 0xC) {
980 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
983 info
->hdmi_level_shift
= hdmi_level_shift
;
988 static void parse_ddi_ports(struct drm_i915_private
*dev_priv
,
989 struct bdb_header
*bdb
)
991 struct drm_device
*dev
= dev_priv
->dev
;
997 if (!dev_priv
->vbt
.child_dev_num
)
1000 if (bdb
->version
< 155)
1003 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++)
1004 parse_ddi_port(dev_priv
, port
, bdb
);
1008 parse_device_mapping(struct drm_i915_private
*dev_priv
,
1009 struct bdb_header
*bdb
)
1011 struct bdb_general_definitions
*p_defs
;
1012 union child_device_config
*p_child
, *child_dev_ptr
;
1013 int i
, child_device_num
, count
;
1016 p_defs
= find_section(bdb
, BDB_GENERAL_DEFINITIONS
);
1018 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1021 /* judge whether the size of child device meets the requirements.
1022 * If the child device size obtained from general definition block
1023 * is different with sizeof(struct child_device_config), skip the
1024 * parsing of sdvo device info
1026 if (p_defs
->child_dev_size
!= sizeof(*p_child
)) {
1027 /* different child dev size . Ignore it */
1028 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
1031 /* get the block size of general definitions */
1032 block_size
= get_blocksize(p_defs
);
1033 /* get the number of child device */
1034 child_device_num
= (block_size
- sizeof(*p_defs
)) /
1037 /* get the number of child device that is present */
1038 for (i
= 0; i
< child_device_num
; i
++) {
1039 p_child
= &(p_defs
->devices
[i
]);
1040 if (!p_child
->common
.device_type
) {
1041 /* skip the device block if device type is invalid */
1047 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1050 dev_priv
->vbt
.child_dev
= kcalloc(count
, sizeof(*p_child
), GFP_KERNEL
);
1051 if (!dev_priv
->vbt
.child_dev
) {
1052 DRM_DEBUG_KMS("No memory space for child device\n");
1056 dev_priv
->vbt
.child_dev_num
= count
;
1058 for (i
= 0; i
< child_device_num
; i
++) {
1059 p_child
= &(p_defs
->devices
[i
]);
1060 if (!p_child
->common
.device_type
) {
1061 /* skip the device block if device type is invalid */
1065 if (p_child
->common
.dvo_port
>= DVO_PORT_MIPIA
1066 && p_child
->common
.dvo_port
<= DVO_PORT_MIPID
1067 &&p_child
->common
.device_type
& DEVICE_TYPE_MIPI_OUTPUT
) {
1068 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1069 dev_priv
->vbt
.has_mipi
= 1;
1070 dev_priv
->vbt
.dsi
.port
= p_child
->common
.dvo_port
;
1073 child_dev_ptr
= dev_priv
->vbt
.child_dev
+ count
;
1075 memcpy((void *)child_dev_ptr
, (void *)p_child
,
1082 init_vbt_defaults(struct drm_i915_private
*dev_priv
)
1084 struct drm_device
*dev
= dev_priv
->dev
;
1087 dev_priv
->vbt
.crt_ddc_pin
= GMBUS_PORT_VGADDC
;
1089 /* Default to having backlight */
1090 dev_priv
->vbt
.backlight
.present
= true;
1092 /* LFP panel data */
1093 dev_priv
->vbt
.lvds_dither
= 1;
1094 dev_priv
->vbt
.lvds_vbt
= 0;
1096 /* SDVO panel data */
1097 dev_priv
->vbt
.sdvo_lvds_vbt_mode
= NULL
;
1099 /* general features */
1100 dev_priv
->vbt
.int_tv_support
= 1;
1101 dev_priv
->vbt
.int_crt_support
= 1;
1103 /* Default to using SSC */
1104 dev_priv
->vbt
.lvds_use_ssc
= 1;
1106 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1109 dev_priv
->vbt
.lvds_ssc_freq
= intel_bios_ssc_frequency(dev
,
1110 !HAS_PCH_SPLIT(dev
));
1111 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv
->vbt
.lvds_ssc_freq
);
1113 for (port
= PORT_A
; port
< I915_MAX_PORTS
; port
++) {
1114 struct ddi_vbt_port_info
*info
=
1115 &dev_priv
->vbt
.ddi_port_info
[port
];
1117 /* Recommended BSpec default: 800mV 0dB. */
1118 info
->hdmi_level_shift
= 6;
1120 info
->supports_dvi
= (port
!= PORT_A
&& port
!= PORT_E
);
1121 info
->supports_hdmi
= info
->supports_dvi
;
1122 info
->supports_dp
= (port
!= PORT_E
);
1126 static int intel_no_opregion_vbt_callback(const struct dmi_system_id
*id
)
1128 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
1129 "VBIOS ROM for %s\n",
1134 static const struct dmi_system_id intel_no_opregion_vbt
[] = {
1136 .callback
= intel_no_opregion_vbt_callback
,
1137 .ident
= "ThinkCentre A57",
1139 DMI_MATCH(DMI_SYS_VENDOR
, "LENOVO"),
1140 DMI_MATCH(DMI_PRODUCT_NAME
, "97027RG"),
1146 static struct bdb_header
*validate_vbt(char *base
, size_t size
,
1147 struct vbt_header
*vbt
,
1151 struct bdb_header
*bdb
;
1154 DRM_DEBUG_DRIVER("VBT signature missing\n");
1158 offset
= (char *)vbt
- base
;
1159 if (offset
+ sizeof(struct vbt_header
) > size
) {
1160 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1164 if (memcmp(vbt
->signature
, "$VBT", 4)) {
1165 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1169 offset
+= vbt
->bdb_offset
;
1170 if (offset
+ sizeof(struct bdb_header
) > size
) {
1171 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1175 bdb
= (struct bdb_header
*)(base
+ offset
);
1176 if (offset
+ bdb
->bdb_size
> size
) {
1177 DRM_DEBUG_DRIVER("BDB incomplete\n");
1181 DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
1182 source
, vbt
->signature
);
1187 * intel_parse_bios - find VBT and initialize settings from the BIOS
1190 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1191 * to appropriate values.
1193 * Returns 0 on success, nonzero on failure.
1196 intel_parse_bios(struct drm_device
*dev
)
1198 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1199 struct pci_dev
*pdev
= dev
->pdev
;
1200 struct bdb_header
*bdb
= NULL
;
1201 u8 __iomem
*bios
= NULL
;
1203 if (HAS_PCH_NOP(dev
))
1206 init_vbt_defaults(dev_priv
);
1208 /* XXX Should this validation be moved to intel_opregion.c? */
1209 if (!dmi_check_system(intel_no_opregion_vbt
) && dev_priv
->opregion
.vbt
)
1210 bdb
= validate_vbt((char *)dev_priv
->opregion
.header
, OPREGION_SIZE
,
1211 (struct vbt_header
*)dev_priv
->opregion
.vbt
,
1217 bios
= pci_map_rom(pdev
, &size
);
1221 /* Scour memory looking for the VBT signature */
1222 for (i
= 0; i
+ 4 < size
; i
++) {
1223 if (memcmp(bios
+ i
, "$VBT", 4) == 0) {
1224 bdb
= validate_vbt(bios
, size
,
1225 (struct vbt_header
*)(bios
+ i
),
1232 pci_unmap_rom(pdev
, bios
);
1237 /* Grab useful general definitions */
1238 parse_general_features(dev_priv
, bdb
);
1239 parse_general_definitions(dev_priv
, bdb
);
1240 parse_lfp_panel_data(dev_priv
, bdb
);
1241 parse_lfp_backlight(dev_priv
, bdb
);
1242 parse_sdvo_panel_data(dev_priv
, bdb
);
1243 parse_sdvo_device_mapping(dev_priv
, bdb
);
1244 parse_device_mapping(dev_priv
, bdb
);
1245 parse_driver_features(dev_priv
, bdb
);
1246 parse_edp(dev_priv
, bdb
);
1247 parse_mipi(dev_priv
, bdb
);
1248 parse_ddi_ports(dev_priv
, bdb
);
1251 pci_unmap_rom(pdev
, bios
);
1256 /* Ensure that vital registers have been initialised, even if the BIOS
1257 * is absent or just failing to do its job.
1259 void intel_setup_bios(struct drm_device
*dev
)
1261 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1263 /* Set the Panel Power On/Off timings if uninitialized. */
1264 if (!HAS_PCH_SPLIT(dev
) &&
1265 I915_READ(PP_ON_DELAYS
) == 0 && I915_READ(PP_OFF_DELAYS
) == 0) {
1266 /* Set T2 to 40ms and T5 to 200ms */
1267 I915_WRITE(PP_ON_DELAYS
, 0x019007d0);
1269 /* Set T3 to 35ms and Tx to 200ms */
1270 I915_WRITE(PP_OFF_DELAYS
, 0x015e07d0);